//
// Created by ✎﹏ℳ๓独赏 ☆独醉 on 2023/3/3.
//
#include <stdio.h>
int main(){
    char ch;
    //getchar(输入) --- 接收一个键盘字符并返回 --- putchar(输出)
    //EOF --- end of file --- -1
    while((ch=getchar())!=EOF){
        putchar(ch);
    }
    return 0;
}